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- // Copyright 2019 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #ifndef COMPONENTS_PERFORMANCE_MANAGER_WEB_CONTENTS_PROXY_IMPL_H_
- #define COMPONENTS_PERFORMANCE_MANAGER_WEB_CONTENTS_PROXY_IMPL_H_
- #include <cstdint>
- namespace content {
- class WebContents;
- } // namespace content
- namespace performance_manager {
- // A WebContentsProxyImpl is used to post messages out of the performance
- // manager sequence that are bound for a WebContents running on the UI thread.
- // The object is bound to the UI thread. A WeakPtr<WebContentsProxyImpl> is
- // effectively equivalent to a WeakPtr<WebContents>.
- //
- // This class is opaquely embedded in a WebContentsProxy, which hides the fact
- // that a weak pointer is being used under the hood.
- class WebContentsProxyImpl {
- public:
- WebContentsProxyImpl();
- WebContentsProxyImpl(const WebContentsProxyImpl&) = delete;
- WebContentsProxyImpl& operator=(const WebContentsProxyImpl&) = delete;
- virtual ~WebContentsProxyImpl();
- // Allows resolving this proxy to the underlying WebContents. This must only
- // be called on the UI thread.
- virtual content::WebContents* GetWebContents() const = 0;
- // Returns the ID of the last committed navigation in the main frame of the
- // web contents. This must only be called on the UI thread.
- virtual int64_t LastNavigationId() const = 0;
- // Similar to the above, but for the last non same-document navigation
- // associated with this WebContents. This is always for a navigation that is
- // older or equal to "LastNavigationId". This must only be called on the UI
- // thread.
- virtual int64_t LastNewDocNavigationId() const = 0;
- };
- } // namespace performance_manager
- #endif // COMPONENTS_PERFORMANCE_MANAGER_WEB_CONTENTS_PROXY_IMPL_H_
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